Life Expectancy Watch
Finally, someone has designed a product that never lets you forget death's cold grip constantly firming on your wrist. A patent was filed in 1991 for the "Life Expectancy Watch," which monitors and displays the "approximate time remaining in a lifespan of an individual" by decrementing years, days, hours, minutes, and seconds to your actuarially-determined death date. The watch also has the ability to shift the countdown as the individual ages. This would be a great way to evaluate choices in your daily life. Thinking about jumping the Snake River Canyon in a rocket-powered skycycle? Your watch says you won't die until 2012, so I say go for it.